165 lines
3.8 KiB
C
165 lines
3.8 KiB
C
/*
|
|
* This file is part of wl1271
|
|
*
|
|
* Copyright (C) 2008-2009 Nokia Corporation
|
|
*
|
|
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
|
|
* 02110-1301 USA
|
|
*
|
|
*/
|
|
|
|
#include "wl1271_reg.h"
|
|
#include "wl1271_ps.h"
|
|
#include "wl1271_io.h"
|
|
|
|
#define WL1271_WAKEUP_TIMEOUT 500
|
|
|
|
void wl1271_elp_work(struct work_struct *work)
|
|
{
|
|
struct delayed_work *dwork;
|
|
struct wl1271 *wl;
|
|
|
|
dwork = container_of(work, struct delayed_work, work);
|
|
wl = container_of(dwork, struct wl1271, elp_work);
|
|
|
|
wl1271_debug(DEBUG_PSM, "elp work");
|
|
|
|
mutex_lock(&wl->mutex);
|
|
|
|
if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags) ||
|
|
!test_bit(WL1271_FLAG_PSM, &wl->flags))
|
|
goto out;
|
|
|
|
wl1271_debug(DEBUG_PSM, "chip to elp");
|
|
wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_SLEEP);
|
|
set_bit(WL1271_FLAG_IN_ELP, &wl->flags);
|
|
|
|
out:
|
|
mutex_unlock(&wl->mutex);
|
|
}
|
|
|
|
#define ELP_ENTRY_DELAY 5
|
|
|
|
/* Routines to toggle sleep mode while in ELP */
|
|
void wl1271_ps_elp_sleep(struct wl1271 *wl)
|
|
{
|
|
if (test_bit(WL1271_FLAG_PSM, &wl->flags)) {
|
|
cancel_delayed_work(&wl->elp_work);
|
|
ieee80211_queue_delayed_work(wl->hw, &wl->elp_work,
|
|
msecs_to_jiffies(ELP_ENTRY_DELAY));
|
|
}
|
|
}
|
|
|
|
int wl1271_ps_elp_wakeup(struct wl1271 *wl, bool chip_awake)
|
|
{
|
|
DECLARE_COMPLETION_ONSTACK(compl);
|
|
unsigned long flags;
|
|
int ret;
|
|
u32 start_time = jiffies;
|
|
bool pending = false;
|
|
|
|
if (!test_bit(WL1271_FLAG_IN_ELP, &wl->flags))
|
|
return 0;
|
|
|
|
wl1271_debug(DEBUG_PSM, "waking up chip from elp");
|
|
|
|
/*
|
|
* The spinlock is required here to synchronize both the work and
|
|
* the completion variable in one entity.
|
|
*/
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
if (work_pending(&wl->irq_work) || chip_awake)
|
|
pending = true;
|
|
else
|
|
wl->elp_compl = &compl;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
|
|
wl1271_raw_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, ELPCTRL_WAKE_UP);
|
|
|
|
if (!pending) {
|
|
ret = wait_for_completion_timeout(
|
|
&compl, msecs_to_jiffies(WL1271_WAKEUP_TIMEOUT));
|
|
if (ret == 0) {
|
|
wl1271_error("ELP wakeup timeout!");
|
|
ret = -ETIMEDOUT;
|
|
goto err;
|
|
} else if (ret < 0) {
|
|
wl1271_error("ELP wakeup completion error.");
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
clear_bit(WL1271_FLAG_IN_ELP, &wl->flags);
|
|
|
|
wl1271_debug(DEBUG_PSM, "wakeup time: %u ms",
|
|
jiffies_to_msecs(jiffies - start_time));
|
|
goto out;
|
|
|
|
err:
|
|
spin_lock_irqsave(&wl->wl_lock, flags);
|
|
wl->elp_compl = NULL;
|
|
spin_unlock_irqrestore(&wl->wl_lock, flags);
|
|
return ret;
|
|
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
int wl1271_ps_set_mode(struct wl1271 *wl, enum wl1271_cmd_ps_mode mode,
|
|
bool send)
|
|
{
|
|
int ret;
|
|
|
|
switch (mode) {
|
|
case STATION_POWER_SAVE_MODE:
|
|
wl1271_debug(DEBUG_PSM, "entering psm");
|
|
|
|
ret = wl1271_cmd_ps_mode(wl, STATION_POWER_SAVE_MODE, send);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
set_bit(WL1271_FLAG_PSM, &wl->flags);
|
|
break;
|
|
case STATION_ACTIVE_MODE:
|
|
default:
|
|
wl1271_debug(DEBUG_PSM, "leaving psm");
|
|
ret = wl1271_ps_elp_wakeup(wl, false);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* disable beacon early termination */
|
|
ret = wl1271_acx_bet_enable(wl, false);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* disable beacon filtering */
|
|
ret = wl1271_acx_beacon_filter_opt(wl, false);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = wl1271_cmd_ps_mode(wl, STATION_ACTIVE_MODE, send);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
clear_bit(WL1271_FLAG_PSM, &wl->flags);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|